package com.atguigu.lease.web.admin.service.impl;

import com.atguigu.lease.common.constant.RedisConstant;
import com.atguigu.lease.common.exceptions.LeaseException;
import com.atguigu.lease.common.result.ResultCodeEnum;
import com.atguigu.lease.common.utils.JwtUtil;
import com.atguigu.lease.model.entity.SystemUser;
import com.atguigu.lease.model.enums.BaseStatus;
import com.atguigu.lease.web.admin.service.LoginService;
import com.atguigu.lease.web.admin.service.SystemUserService;
import com.atguigu.lease.web.admin.vo.login.CaptchaVo;
import com.atguigu.lease.web.admin.vo.login.LoginVo;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.wf.captcha.SpecCaptcha;
import com.wf.captcha.base.Captcha;
import org.apache.commons.codec.digest.DigestUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;
import org.springframework.util.ObjectUtils;

import java.util.Locale;
import java.util.UUID;
import java.util.concurrent.TimeUnit;

@Service
public class LoginServiceImpl implements LoginService {
    @Autowired
    private RedisTemplate<String,Object> redisTemplate;
    @Autowired
    private SystemUserService systemUserService;
    @Override
    public CaptchaVo getCapthcha() {
        //生成验证码图片
        SpecCaptcha specCaptcha = new SpecCaptcha(130, 48, 4);
        //数字和字母
        specCaptcha.setCharType(Captcha.TYPE_DEFAULT);
        //将验证码存到Redis
        String code = specCaptcha.text().toLowerCase();//生成验证码
        String key = RedisConstant.ADMIN_LOGIN_PREFIX + UUID.randomUUID().toString();
        redisTemplate.opsForValue().set(key,code,RedisConstant.ADMIN_LOGIN_CAPTCHA_TTL_SEC, TimeUnit.SECONDS);
        //将图片和key存到vo中返回 base64将字节转化为字符串
        String img = specCaptcha.toBase64();
        CaptchaVo captchaVo = new CaptchaVo(img, key);
        return captchaVo;
    }

    @Override
    public String login(LoginVo loginVo) {
        //校验验证码是否为空不空继续
        if (ObjectUtils.isEmpty(loginVo.getCaptchaCode())){
            throw  new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_NOT_FOUND);
        }
        //根据key判断验证码是否过期
        String rediscode =(String) redisTemplate.opsForValue().get(loginVo.getCaptchaKey());
        if (ObjectUtils.isEmpty(rediscode)){
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_EXPIRED);
        }
        //进行验证码对比
        if (!rediscode.equalsIgnoreCase(loginVo.getCaptchaCode())){
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_ERROR);
        }
        //查询账号不为空继续进行比较
        LambdaQueryWrapper<SystemUser> systemUserLambdaQueryWrapper = new LambdaQueryWrapper<>();
        systemUserLambdaQueryWrapper.eq(SystemUser::getUsername,loginVo.getUsername());
        SystemUser systemUser = systemUserService.getOne(systemUserLambdaQueryWrapper);
        if (systemUser==null){
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_NOT_EXIST_ERROR);
        }
        //比较密码
        if (!systemUser.getPassword().equals(DigestUtils.md5Hex(loginVo.getPassword()))){
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_ERROR);
        }
        //检查账号状态是否正常
        if (systemUser.getStatus()== BaseStatus.DISABLE){
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_DISABLED_ERROR);
        }
        //生成token
        String token = JwtUtil.createToken(systemUser.getId(), systemUser.getUsername());
        return token;
    }
}
